PRISM Q&A CORNER - Ellen Kim , MD, Director, Penn Cutaneous Lymphoma Program, Vice Chair of Clinical Operations, Dermatology Department, and Professor of Dermatology at the Hospital of the University of Pennsylvania

NEW YORK, N.Y., July 15, 2024 – PRISM MarketView is pleased to announce an exclusive Q&A session with Dr. Ellen Kim, discussing the promising interim results of Soligenix's (Nasdaq:SNGX) HyBryte™ from the ongoing investigator-initiated study (IIS). HyBryte™ (synthetic hypericin) is a novel photodynamic therapy for the treatment of early-stage cutaneous T-cell lymphoma (CTCL), a rare form of non-Hodgkin’s lymphoma with no FDA-approved first-line treatments.

Promising Interim Study Results: Dr. Kim shared significant findings from the IIS, stating, "Thus far in our IIS we have enrolled and treated six patients with HyBryte™ spanning a time frame up to 44 weeks. While the sample size is small, the results have been dramatic with 3-out-of-4 – that’s 75% of the patients – responding positively to HyBryte™ therapy through at least 12 weeks of treatment."

Importance of the Investigator-Initiated Study: On the rationale for the IIS, Dr. Kim explained, "We were interested in studying HyBryte™ efficacy and safety in early stage CTCL patients given as a continuous treatment over a 1-year period... An IIS, like ours, gives a glimpse as to how drugs can be used in a ‘real world’ setting."

Future Directions: Looking ahead, Dr. Kim highlighted upcoming milestones, saying, "In the short term, we expect to issue results from the IIS as data warrants... Additionally, these initial results are very exciting and build upon the increasing body of positive HyBryte™ data as we move into the 18-week confirmatory FLASH2 study later this year."

For a deeper dive into Dr. Kim's insights and the potential impact of HyBryte™ on CTCL treatment, read the full Q&A on PRISM MarketView. https://prismmarketview.com/soligenixs-hybryte-lighting-the-way-towards-commercial-success-with-promising-flash-study-results/

Soligenix is a late-stage biopharmaceutical company focused on developing and commercializing products to treat rare diseases where there is an unmet medical need. Our Specialized BioTherapeutics business segment is developing and moving toward potential commercialization of HyBryte™ (SGX301 or synthetic hypericin sodium) as a novel photodynamic therapy utilizing safe visible light for the treatment of cutaneous T-cell lymphoma (CTCL). With successful completion of the second Phase 3 study, regulatory approvals will be sought to support potential commercialization worldwide. Development programs in this business segment also include expansion of synthetic hypericin (SGX302) into psoriasis, our first-in-class innate defense regulator (IDR) technology, dusquetide (SGX942) for the treatment of inflammatory diseases, including oral mucositis in head and neck cancer, and (SGX945) in Behçet's Disease.

Our Public Health Solutions business segment includes development programs for RiVax®, our ricin toxin vaccine candidate, as well as our vaccine programs targeting filoviruses (such as Marburg and Ebola) and CiVax™, our vaccine candidate for the prevention of COVID-19 (caused by SARS-CoV-2). The development of our vaccine programs incorporates the use of our proprietary heat stabilization platform technology, known as ThermoVax®. To date, this business segment has been supported with government grant and contract funding from the National Institute of Allergy and Infectious Diseases (NIAID), the Defense Threat Reduction Agency (DTRA) and the Biomedical Advanced Research and Development Authority (BARDA).

For further information regarding Soligenix, Inc., please visit the Company's website at https://www.soligenix.com and follow us on LinkedIn and Twitter at @Soligenix_Inc.

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Disclaimer
This communication was produced by PRISM MarketView, an affiliate of PCG Advisory Inc., (together "PCG"). PCG is not a registered or licensed broker-dealer nor investment adviser. No information contained in this communication constitutes an offer to sell, a solicitation of an offer to buy, or a recommendation of any security. PCG may be compensated by respective clients for publicizing information relating to its clients’ securities. See www.pcgadvisory.com/disclosures.

This press release, while the views and opinions of the clinical investigator, may contain forward-looking statements that reflect Soligenix's current expectations about its future results, performance, prospects and opportunities, including but not limited to, potential market sizes, patient populations, clinical trial enrollment, the expected timing for closing the offering described herein and the intended use of proceeds therefrom. Statements that are not historical facts, such as "anticipates," "estimates," "believes," "hopes," "intends," "plans," "expects," "goal," "may," "suggest," "will," "potential," or similar expressions, are forward-looking statements. These statements are subject to a number of risks, uncertainties and other factors that could cause actual events or results in future periods to differ materially from what is expressed in, or implied by, these statements, and include the expected amount and use of proceeds from the offering and the expected closing date of the offering. Soligenix cannot assure you that it will be able to successfully develop, achieve regulatory approval for or commercialize products based on its technologies, particularly in light of the significant uncertainty inherent in developing therapeutics and vaccines against bioterror threats, conducting preclinical and clinical trials of therapeutics and vaccines, obtaining regulatory approvals and manufacturing therapeutics and vaccines, that product development and commercialization efforts will not be reduced or discontinued due to difficulties or delays in clinical trials or due to lack of progress or positive results from research and development efforts, that it will be able to successfully obtain any further funding to support product development and commercialization efforts, including grants and awards, maintain its existing grants which are subject to performance requirements, enter into any biodefense procurement contracts with the U.S. Government or other countries, that it will be able to compete with larger and better financed competitors in the biotechnology industry, that changes in health care practice, third party reimbursement limitations and Federal and/or state health care reform initiatives will not negatively affect its business, or that the U.S. Congress may not pass any legislation that would provide additional funding for the Project BioShield program. In addition, there can be no assurance as to the timing or success of any of its clinical/preclinical trials. Despite the statistically significant result achieved in the first HyBryte™ (SGX301) Phase 3 clinical trial for the treatment of cutaneous T-cell lymphoma, there can be no assurance that the second HyBryte™ (SGX301) Phase 3 clinical trial will be successful or that a marketing authorization from the FDA or EMA will be granted. Additionally, although the EMA has agreed to the key design components of the second HyBryte™ (SGX301) Phase 3 clinical trial, no assurance can be given that the Company will be able to modify the development path to adequately address the FDA's concerns or that the FDA will not require a longer duration comparative study. Notwithstanding the result in the first HyBryte™ (SGX301) Phase 3 clinical trial for the treatment of cutaneous T-cell lymphoma and the Phase 2a clinical trial of SGX302 for the treatment of psoriasis, there can be no assurance as to the timing or success of the clinical trials of SGX302 for the treatment of psoriasis. Further, there can be no assurance that RiVax® will qualify for a biodefense Priority Review Voucher (PRV) or that the prior sales of PRVs will be indicative of any potential sales price for a PRV for RiVax®. Also, no assurance can be provided that the Company will receive or continue to receive non-dilutive government funding from grants and contracts that have been or may be awarded or for which the Company will apply in the future. These and other risk factors are described from time to time in filings with the Securities and Exchange Commission (the "SEC"), including, but not limited to, Soligenix's reports on Forms 10-Q and 10-K. Unless required by law, Soligenix assumes no obligation to update or revise any forward-looking statements as a result of new information or future events.

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